Lavatory basin



FIG. 1 is a top plan view of a lavatory basin showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof, the left side being a mirror image of the right side shown;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a perspective view taken from the top, front and right side thereof; and

FIG. 7 is a cross sectional view taken on line 7--7 of FIG. 1. 

The ornamental design for a lavatory basin, substantially as shown and described. 